Superconducting magnet and centrifugal pump: what they have in common

1. Step 1. Superconducting magnet — is made of — Helium. It is cooled with liquid helium.
2. Step 2. Helium — is used in — Airship. After the Hindenburg — helium.
3. Step 3. Airship — uses — Hydrogen. Zeppelins were filled with hydrogen.
4. Step 4. Hydrogen — is used in — Liquid-propellant rocket engine. Hydrogen is an efficient fuel.
5. Step 5. Liquid-propellant rocket engine — has part — Centrifugal pump. Turbopumps deliver the propellant.

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